The linkages between sustainable energy development and entrepreneurship are focussed, and studies in this field are critically discussed in this chapter. The new sustainable energy technologies and other innovations are presented, such as solar powered trains, electric tires, liquid sunlight, etc. The role of entrepreneurs in developing new sustainable energy technologies and other innovations in sustainable energy is emphasized. The main barriers and drivers of entrepreneurship and innovations in sustainable energy are scrutinized and grouped in regulatory, economic, informational, technological, etc. barriers based on comprehensive literature review. The policies and measures targeting these barriers are analysed and discussed.